40102240 has 48 divisors (see below), whose sum is σ = 95201568. Its totient is φ = 15963136.

The previous prime is 40102213. The next prime is 40102253. The reversal of 40102240 is 4220104.

It is a self number, because there is not a number n which added to its sum of digits gives 40102240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41604 + ... + 42556.

It is an arithmetic number, because the mean of its divisors is an integer number (1983366).

Almost surely, 2^40102240 is an apocalyptic number.

40102240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40102240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47600784).

40102240 is an abundant number, since it is smaller than the sum of its proper divisors (55099328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40102240 is a wasteful number, since it uses less digits than its factorization.

40102240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231 (or 1223 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 40102240 is about 6332.6329437289. The cubic root of 40102240 is about 342.2863213329.

Adding to 40102240 its reverse (4220104), we get a palindrome (44322344).

The spelling of 40102240 in words is "forty million, one hundred two thousand, two hundred forty".